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MIPS: RB532: Convert to GPIO lib

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This patch converts the rb532 code to use gpio library
and register its gpio chip.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Florian Fainelli
2008-08-23 18:54:34 +02:00
committed by Ralf Baechle
parent 09b7dcf220
commit d888e25b8d
3 changed files with 175 additions and 128 deletions
Download Patch File Download Diff File Expand all files Collapse all files

226
arch/mips/rb532/gpio.c
View File

@ -27,20 +27,23 @@
*/
#include <linux/kernel.h>
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <asm/addrspace.h>
#include <linux/gpio.h>
#include <asm/mach-rc32434/rb.h>
#include <asm/mach-rc32434/gpio.h>
struct rb532_gpio_reg __iomem *rb532_gpio_reg0;
EXPORT_SYMBOL(rb532_gpio_reg0);
struct rb532_gpio_chip {
struct gpio_chip chip;
void __iomem *regbase;
void (*set_int_level)(struct gpio_chip *chip, unsigned offset, int value);
int (*get_int_level)(struct gpio_chip *chip, unsigned offset);
void (*set_int_status)(struct gpio_chip *chip, unsigned offset, int value);
int (*get_int_status)(struct gpio_chip *chip, unsigned offset);
};
struct mpmc_device dev3;
@ -108,108 +111,199 @@ unsigned char get_latch_u5(void)
}
EXPORT_SYMBOL(get_latch_u5);
int rb532_gpio_get_value(unsigned gpio)
/*
* Return GPIO level */
static int rb532_gpio_get(struct gpio_chip *chip, unsigned offset)
{
return readl(&rb532_gpio_reg0->gpiod) & (1 << gpio);
u32 mask = 1 << offset;
struct rb532_gpio_chip *gpch;
gpch = container_of(chip, struct rb532_gpio_chip, chip);
return readl(gpch->regbase + GPIOD) & mask;
}
EXPORT_SYMBOL(rb532_gpio_get_value);
void rb532_gpio_set_value(unsigned gpio, int value)
/*
* Set output GPIO level
*/
static void rb532_gpio_set(struct gpio_chip *chip,
unsigned offset, int value)
{
unsigned tmp;
unsigned long flags;
u32 mask = 1 << offset;
u32 tmp;
struct rb532_gpio_chip *gpch;
void __iomem *gpvr;
tmp = readl(&rb532_gpio_reg0->gpiod) & ~(1 << gpio);
gpch = container_of(chip, struct rb532_gpio_chip, chip);
gpvr = gpch->regbase + GPIOD;
local_irq_save(flags);
tmp = readl(gpvr);
if (value)
tmp |= 1 << gpio;
writel(tmp, (void *)&rb532_gpio_reg0->gpiod);
tmp |= mask;
else
tmp &= ~mask;
writel(tmp, gpvr);
local_irq_restore(flags);
}
EXPORT_SYMBOL(rb532_gpio_set_value);
int rb532_gpio_direction_input(unsigned gpio)
/*
* Set GPIO direction to input
*/
static int rb532_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
{
writel(readl(&rb532_gpio_reg0->gpiocfg) & ~(1 << gpio),
(void *)&rb532_gpio_reg0->gpiocfg);
unsigned long flags;
u32 mask = 1 << offset;
u32 value;
struct rb532_gpio_chip *gpch;
void __iomem *gpdr;
gpch = container_of(chip, struct rb532_gpio_chip, chip);
gpdr = gpch->regbase + GPIOCFG;
local_irq_save(flags);
value = readl(gpdr);
value &= ~mask;
writel(value, gpdr);
local_irq_restore(flags);
return 0;
}
EXPORT_SYMBOL(rb532_gpio_direction_input);
int rb532_gpio_direction_output(unsigned gpio, int value)
/*
* Set GPIO direction to output
*/
static int rb532_gpio_direction_output(struct gpio_chip *chip,
unsigned offset, int value)
{
gpio_set_value(gpio, value);
writel(readl(&rb532_gpio_reg0->gpiocfg) | (1 << gpio),
(void *)&rb532_gpio_reg0->gpiocfg);
unsigned long flags;
u32 mask = 1 << offset;
u32 tmp;
struct rb532_gpio_chip *gpch;
void __iomem *gpdr;
gpch = container_of(chip, struct rb532_gpio_chip, chip);
writel(mask, gpch->regbase + GPIOD);
gpdr = gpch->regbase + GPIOCFG;
local_irq_save(flags);
tmp = readl(gpdr);
tmp |= mask;
writel(tmp, gpdr);
local_irq_restore(flags);
return 0;
}
EXPORT_SYMBOL(rb532_gpio_direction_output);
void rb532_gpio_set_int_level(unsigned gpio, int value)
/*
* Set the GPIO interrupt level
*/
static void rb532_gpio_set_int_level(struct gpio_chip *chip,
unsigned offset, int value)
{
unsigned tmp;
unsigned long flags;
u32 mask = 1 << offset;
u32 tmp;
struct rb532_gpio_chip *gpch;
void __iomem *gpil;
tmp = readl(&rb532_gpio_reg0->gpioilevel) & ~(1 << gpio);
gpch = container_of(chip, struct rb532_gpio_chip, chip);
gpil = gpch->regbase + GPIOILEVEL;
local_irq_save(flags);
tmp = readl(gpil);
if (value)
tmp |= 1 << gpio;
writel(tmp, (void *)&rb532_gpio_reg0->gpioilevel);
tmp |= mask;
else
tmp &= ~mask;
writel(tmp, gpil);
local_irq_restore(flags);
}
EXPORT_SYMBOL(rb532_gpio_set_int_level);
int rb532_gpio_get_int_level(unsigned gpio)
/*
* Get the GPIO interrupt level
*/
static int rb532_gpio_get_int_level(struct gpio_chip *chip, unsigned offset)
{
return readl(&rb532_gpio_reg0->gpioilevel) & (1 << gpio);
u32 mask = 1 << offset;
struct rb532_gpio_chip *gpch;
gpch = container_of(chip, struct rb532_gpio_chip, chip);
return readl(gpch->regbase + GPIOILEVEL) & mask;
}
EXPORT_SYMBOL(rb532_gpio_get_int_level);
void rb532_gpio_set_int_status(unsigned gpio, int value)
/*
* Set the GPIO interrupt status
*/
static void rb532_gpio_set_int_status(struct gpio_chip *chip,
unsigned offset, int value)
{
unsigned tmp;
unsigned long flags;
u32 mask = 1 << offset;
u32 tmp;
struct rb532_gpio_chip *gpch;
void __iomem *gpis;
tmp = readl(&rb532_gpio_reg0->gpioistat);
gpch = container_of(chip, struct rb532_gpio_chip, chip);
gpis = gpch->regbase + GPIOISTAT;
local_irq_save(flags);
tmp = readl(gpis);
if (value)
tmp |= 1 << gpio;
writel(tmp, (void *)&rb532_gpio_reg0->gpioistat);
tmp |= mask;
else
tmp &= ~mask;
writel(tmp, gpis);
local_irq_restore(flags);
}
EXPORT_SYMBOL(rb532_gpio_set_int_status);
int rb532_gpio_get_int_status(unsigned gpio)
/*
* Get the GPIO interrupt status
*/
static int rb532_gpio_get_int_status(struct gpio_chip *chip, unsigned offset)
{
return readl(&rb532_gpio_reg0->gpioistat) & (1 << gpio);
}
EXPORT_SYMBOL(rb532_gpio_get_int_status);
u32 mask = 1 << offset;
struct rb532_gpio_chip *gpch;
void rb532_gpio_set_func(unsigned gpio, int value)
{
unsigned tmp;
tmp = readl(&rb532_gpio_reg0->gpiofunc);
if (value)
tmp |= 1 << gpio;
writel(tmp, (void *)&rb532_gpio_reg0->gpiofunc);
gpch = container_of(chip, struct rb532_gpio_chip, chip);
return readl(gpch->regbase + GPIOISTAT) & mask;
}
EXPORT_SYMBOL(rb532_gpio_set_func);
int rb532_gpio_get_func(unsigned gpio)
{
return readl(&rb532_gpio_reg0->gpiofunc) & (1 << gpio);
}
EXPORT_SYMBOL(rb532_gpio_get_func);
static struct rb532_gpio_chip rb532_gpio_chip[] = {
[0] = {
.chip = {
.label = "gpio0",
.direction_input = rb532_gpio_direction_input,
.direction_output = rb532_gpio_direction_output,
.get = rb532_gpio_get,
.set = rb532_gpio_set,
.base = 0,
.ngpio = 32,
},
.get_int_level = rb532_gpio_get_int_level,
.set_int_level = rb532_gpio_set_int_level,
.get_int_status = rb532_gpio_get_int_status,
.set_int_status = rb532_gpio_set_int_status,
},
};
int __init rb532_gpio_init(void)
{
rb532_gpio_reg0 = ioremap_nocache(rb532_gpio_reg0_res[0].start,
rb532_gpio_reg0_res[0].end -
rb532_gpio_reg0_res[0].start);
struct resource *r;
if (!rb532_gpio_reg0) {
r = rb532_gpio_reg0_res;
rb532_gpio_chip->regbase = ioremap_nocache(r->start, r->end - r->start);
if (!rb532_gpio_chip->regbase) {
printk(KERN_ERR "rb532: cannot remap GPIO register 0\n");
return -ENXIO;
}
dev3.base = ioremap_nocache(rb532_dev3_ctl_res[0].start,
rb532_dev3_ctl_res[0].end -
rb532_dev3_ctl_res[0].start);
/* Register our GPIO chip */
gpiochip_add(&rb532_gpio_chip->chip);
r = rb532_dev3_ctl_res;
dev3.base = ioremap_nocache(r->start, r->end - r->start);
if (!dev3.base) {
printk(KERN_ERR "rb532: cannot remap device controller 3\n");